Increased knee laxity with hamstring tendon autograft compared to patellar tendon autograft: a cohort study of 5462 patients with primary anterior cruciate ligament reconstruction - Cristiani, R; Sarakatsianos, V; Engström, B; Samuelsson, K; Forssblad, M; Stålman, A (Knee Surg Sports Traumatol Arthrosc, 2019)